1 /* 2 * Copyright 2008 Intel Corporation <hong.liu@intel.com> 3 * Copyright 2008 Red Hat <mjg@redhat.com> 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sub license, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the 14 * next paragraph) shall be included in all copies or substantial 15 * portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 24 * SOFTWARE. 25 * 26 */ 27 28 #include <drm/drmP.h> 29 #include <drm/i915_drm.h> 30 #include "i915_drv.h" 31 #include "intel_drv.h" 32 #include <contrib/dev/acpica/source/include/acpi.h> 33 #include <contrib/dev/acpica/source/include/accommon.h> 34 #include <dev/acpica/acpivar.h> 35 36 #define PCI_ASLE 0xe4 37 #define PCI_ASLS 0xfc 38 39 #define OPREGION_HEADER_OFFSET 0 40 #define OPREGION_ACPI_OFFSET 0x100 41 #define ACPI_CLID 0x01ac /* current lid state indicator */ 42 #define ACPI_CDCK 0x01b0 /* current docking state indicator */ 43 #define OPREGION_SWSCI_OFFSET 0x200 44 #define OPREGION_ASLE_OFFSET 0x300 45 #define OPREGION_VBT_OFFSET 0x400 46 47 #define OPREGION_SIGNATURE "IntelGraphicsMem" 48 #define MBOX_ACPI (1<<0) 49 #define MBOX_SWSCI (1<<1) 50 #define MBOX_ASLE (1<<2) 51 52 struct opregion_header { 53 u8 signature[16]; 54 u32 size; 55 u32 opregion_ver; 56 u8 bios_ver[32]; 57 u8 vbios_ver[16]; 58 u8 driver_ver[16]; 59 u32 mboxes; 60 u8 reserved[164]; 61 } __attribute__((packed)); 62 63 /* OpRegion mailbox #1: public ACPI methods */ 64 struct opregion_acpi { 65 u32 drdy; /* driver readiness */ 66 u32 csts; /* notification status */ 67 u32 cevt; /* current event */ 68 u8 rsvd1[20]; 69 u32 didl[8]; /* supported display devices ID list */ 70 u32 cpdl[8]; /* currently presented display list */ 71 u32 cadl[8]; /* currently active display list */ 72 u32 nadl[8]; /* next active devices list */ 73 u32 aslp; /* ASL sleep time-out */ 74 u32 tidx; /* toggle table index */ 75 u32 chpd; /* current hotplug enable indicator */ 76 u32 clid; /* current lid state*/ 77 u32 cdck; /* current docking state */ 78 u32 sxsw; /* Sx state resume */ 79 u32 evts; /* ASL supported events */ 80 u32 cnot; /* current OS notification */ 81 u32 nrdy; /* driver status */ 82 u8 rsvd2[60]; 83 } __attribute__((packed)); 84 85 /* OpRegion mailbox #2: SWSCI */ 86 struct opregion_swsci { 87 u32 scic; /* SWSCI command|status|data */ 88 u32 parm; /* command parameters */ 89 u32 dslp; /* driver sleep time-out */ 90 u8 rsvd[244]; 91 } __attribute__((packed)); 92 93 /* OpRegion mailbox #3: ASLE */ 94 struct opregion_asle { 95 u32 ardy; /* driver readiness */ 96 u32 aslc; /* ASLE interrupt command */ 97 u32 tche; /* technology enabled indicator */ 98 u32 alsi; /* current ALS illuminance reading */ 99 u32 bclp; /* backlight brightness to set */ 100 u32 pfit; /* panel fitting state */ 101 u32 cblv; /* current brightness level */ 102 u16 bclm[20]; /* backlight level duty cycle mapping table */ 103 u32 cpfm; /* current panel fitting mode */ 104 u32 epfm; /* enabled panel fitting modes */ 105 u8 plut[74]; /* panel LUT and identifier */ 106 u32 pfmb; /* PWM freq and min brightness */ 107 u8 rsvd[102]; 108 } __attribute__((packed)); 109 110 /* ASLE irq request bits */ 111 #define ASLE_SET_ALS_ILLUM (1 << 0) 112 #define ASLE_SET_BACKLIGHT (1 << 1) 113 #define ASLE_SET_PFIT (1 << 2) 114 #define ASLE_SET_PWM_FREQ (1 << 3) 115 #define ASLE_REQ_MSK 0xf 116 117 /* response bits of ASLE irq request */ 118 #define ASLE_ALS_ILLUM_FAILED (1<<10) 119 #define ASLE_BACKLIGHT_FAILED (1<<12) 120 #define ASLE_PFIT_FAILED (1<<14) 121 #define ASLE_PWM_FREQ_FAILED (1<<16) 122 123 /* ASLE backlight brightness to set */ 124 #define ASLE_BCLP_VALID (1<<31) 125 #define ASLE_BCLP_MSK (~(1<<31)) 126 127 /* ASLE panel fitting request */ 128 #define ASLE_PFIT_VALID (1<<31) 129 #define ASLE_PFIT_CENTER (1<<0) 130 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 131 #define ASLE_PFIT_STRETCH_GFX (1<<2) 132 133 /* PWM frequency and minimum brightness */ 134 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 135 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 136 #define ASLE_PFMB_PWM_MASK (0x7ffffe00) 137 #define ASLE_PFMB_PWM_VALID (1<<31) 138 139 #define ASLE_CBLV_VALID (1<<31) 140 141 #define ACPI_OTHER_OUTPUT (0<<8) 142 #define ACPI_VGA_OUTPUT (1<<8) 143 #define ACPI_TV_OUTPUT (2<<8) 144 #define ACPI_DIGITAL_OUTPUT (3<<8) 145 #define ACPI_LVDS_OUTPUT (4<<8) 146 147 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) 148 { 149 struct drm_i915_private *dev_priv = dev->dev_private; 150 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 151 u32 max; 152 153 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); 154 155 if (!(bclp & ASLE_BCLP_VALID)) 156 return ASLE_BACKLIGHT_FAILED; 157 158 bclp &= ASLE_BCLP_MSK; 159 if (bclp > 255) 160 return ASLE_BACKLIGHT_FAILED; 161 162 max = intel_panel_get_max_backlight(dev); 163 intel_panel_set_backlight(dev, bclp * max / 255); 164 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv); 165 166 return 0; 167 } 168 169 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi) 170 { 171 /* alsi is the current ALS reading in lux. 0 indicates below sensor 172 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 173 return 0; 174 } 175 176 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb) 177 { 178 struct drm_i915_private *dev_priv = dev->dev_private; 179 if (pfmb & ASLE_PFMB_PWM_VALID) { 180 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL); 181 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK; 182 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK; 183 pwm = pwm >> 9; 184 /* FIXME - what do we do with the PWM? */ 185 } 186 return 0; 187 } 188 189 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit) 190 { 191 /* Panel fitting is currently controlled by the X code, so this is a 192 noop until modesetting support works fully */ 193 if (!(pfit & ASLE_PFIT_VALID)) 194 return ASLE_PFIT_FAILED; 195 return 0; 196 } 197 198 void intel_opregion_asle_intr(struct drm_device *dev) 199 { 200 struct drm_i915_private *dev_priv = dev->dev_private; 201 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 202 u32 asle_stat = 0; 203 u32 asle_req; 204 205 if (!asle) 206 return; 207 208 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK; 209 210 if (!asle_req) { 211 DRM_DEBUG_DRIVER("non asle set request??\n"); 212 return; 213 } 214 215 if (asle_req & ASLE_SET_ALS_ILLUM) 216 asle_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi)); 217 218 if (asle_req & ASLE_SET_BACKLIGHT) 219 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp)); 220 221 if (asle_req & ASLE_SET_PFIT) 222 asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit)); 223 224 if (asle_req & ASLE_SET_PWM_FREQ) 225 asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb)); 226 227 iowrite32(asle_stat, &asle->aslc); 228 } 229 230 void intel_opregion_gse_intr(struct drm_device *dev) 231 { 232 struct drm_i915_private *dev_priv = dev->dev_private; 233 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 234 u32 asle_stat = 0; 235 u32 asle_req; 236 237 if (!asle) 238 return; 239 240 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK; 241 242 if (!asle_req) { 243 DRM_DEBUG_DRIVER("non asle set request??\n"); 244 return; 245 } 246 247 if (asle_req & ASLE_SET_ALS_ILLUM) { 248 DRM_DEBUG_DRIVER("Illum is not supported\n"); 249 asle_stat |= ASLE_ALS_ILLUM_FAILED; 250 } 251 252 if (asle_req & ASLE_SET_BACKLIGHT) 253 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp)); 254 255 if (asle_req & ASLE_SET_PFIT) { 256 DRM_DEBUG_DRIVER("Pfit is not supported\n"); 257 asle_stat |= ASLE_PFIT_FAILED; 258 } 259 260 if (asle_req & ASLE_SET_PWM_FREQ) { 261 DRM_DEBUG_DRIVER("PWM freq is not supported\n"); 262 asle_stat |= ASLE_PWM_FREQ_FAILED; 263 } 264 265 iowrite32(asle_stat, &asle->aslc); 266 } 267 #define ASLE_ALS_EN (1<<0) 268 #define ASLE_BLC_EN (1<<1) 269 #define ASLE_PFIT_EN (1<<2) 270 #define ASLE_PFMB_EN (1<<3) 271 272 void intel_opregion_enable_asle(struct drm_device *dev) 273 { 274 struct drm_i915_private *dev_priv = dev->dev_private; 275 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 276 277 if (asle) { 278 if (IS_MOBILE(dev)) 279 intel_enable_asle(dev); 280 281 iowrite32(ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN | 282 ASLE_PFMB_EN, 283 &asle->tche); 284 iowrite32(1, &asle->ardy); 285 } 286 } 287 288 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 289 #define ACPI_EV_LID (1<<1) 290 #define ACPI_EV_DOCK (1<<2) 291 292 static struct intel_opregion *system_opregion; 293 294 #if 0 295 static int intel_opregion_video_event(struct notifier_block *nb, 296 unsigned long val, void *data) 297 { 298 /* The only video events relevant to opregion are 0x80. These indicate 299 either a docking event, lid switch or display switch request. In 300 Linux, these are handled by the dock, button and video drivers. 301 */ 302 303 struct opregion_acpi __iomem *acpi; 304 struct acpi_bus_event *event = data; 305 int ret = NOTIFY_OK; 306 307 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 308 return NOTIFY_DONE; 309 310 if (!system_opregion) 311 return NOTIFY_DONE; 312 313 acpi = system_opregion->acpi; 314 315 if (event->type == 0x80 && 316 (ioread32(&acpi->cevt) & 1) == 0) 317 ret = NOTIFY_BAD; 318 319 iowrite32(0, &acpi->csts); 320 321 return ret; 322 } 323 324 static struct notifier_block intel_opregion_notifier = { 325 .notifier_call = intel_opregion_video_event, 326 }; 327 #endif 328 329 static int acpi_is_video_device(ACPI_HANDLE devh) { 330 ACPI_HANDLE h; 331 if (ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) || 332 ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h))) { 333 return 0; 334 } 335 return 1; 336 } 337 338 /* 339 * Initialise the DIDL field in opregion. This passes a list of devices to 340 * the firmware. Values are defined by section B.4.2 of the ACPI specification 341 * (version 3) 342 */ 343 344 static void intel_didl_outputs(struct drm_device *dev) 345 { 346 struct drm_i915_private *dev_priv = dev->dev_private; 347 struct intel_opregion *opregion = &dev_priv->opregion; 348 struct drm_connector *connector; 349 u32 device_id; 350 ACPI_HANDLE handle, acpi_video_bus, acpi_cdev; 351 ACPI_STATUS status; 352 u32 temp; 353 int i = 0; 354 355 handle = acpi_get_handle(dev->dev); 356 if (!handle) 357 return; 358 359 if (acpi_is_video_device(handle)) 360 acpi_video_bus = handle; 361 else { 362 acpi_cdev = NULL; 363 acpi_video_bus = NULL; 364 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, handle, acpi_cdev, 365 &acpi_cdev) != AE_NOT_FOUND) { 366 if (acpi_is_video_device(acpi_cdev)) { 367 acpi_video_bus = acpi_cdev; 368 break; 369 } 370 } 371 } 372 373 if (!acpi_video_bus) { 374 pr_warn("No ACPI video bus found\n"); 375 return; 376 } 377 378 acpi_cdev = NULL; 379 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, acpi_video_bus, acpi_cdev, 380 &acpi_cdev) != AE_NOT_FOUND) { 381 if (i >= 8) { 382 device_printf(dev->dev, "More than 8 outputs detected\n"); 383 return; 384 } 385 status = acpi_GetInteger(acpi_cdev, "_ADR", &device_id); 386 if (ACPI_SUCCESS(status)) { 387 if (!device_id) 388 goto blind_set; 389 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f); 390 i++; 391 } 392 } 393 end: 394 /* If fewer than 8 outputs, the list must be null terminated */ 395 if (i < 8) 396 iowrite32(0, &opregion->acpi->didl[i]); 397 return; 398 399 blind_set: 400 i = 0; 401 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 402 int output_type = ACPI_OTHER_OUTPUT; 403 if (i >= 8) { 404 device_printf(dev->dev, 405 "More than 8 outputs detected\n"); 406 return; 407 } 408 switch (connector->connector_type) { 409 case DRM_MODE_CONNECTOR_VGA: 410 case DRM_MODE_CONNECTOR_DVIA: 411 output_type = ACPI_VGA_OUTPUT; 412 break; 413 case DRM_MODE_CONNECTOR_Composite: 414 case DRM_MODE_CONNECTOR_SVIDEO: 415 case DRM_MODE_CONNECTOR_Component: 416 case DRM_MODE_CONNECTOR_9PinDIN: 417 output_type = ACPI_TV_OUTPUT; 418 break; 419 case DRM_MODE_CONNECTOR_DVII: 420 case DRM_MODE_CONNECTOR_DVID: 421 case DRM_MODE_CONNECTOR_DisplayPort: 422 case DRM_MODE_CONNECTOR_HDMIA: 423 case DRM_MODE_CONNECTOR_HDMIB: 424 output_type = ACPI_DIGITAL_OUTPUT; 425 break; 426 case DRM_MODE_CONNECTOR_LVDS: 427 output_type = ACPI_LVDS_OUTPUT; 428 break; 429 } 430 temp = ioread32(&opregion->acpi->didl[i]); 431 iowrite32(temp | (1<<31) | output_type | i, 432 &opregion->acpi->didl[i]); 433 i++; 434 } 435 goto end; 436 } 437 438 static void intel_setup_cadls(struct drm_device *dev) 439 { 440 struct drm_i915_private *dev_priv = dev->dev_private; 441 struct intel_opregion *opregion = &dev_priv->opregion; 442 int i = 0; 443 u32 disp_id; 444 445 /* Initialize the CADL field by duplicating the DIDL values. 446 * Technically, this is not always correct as display outputs may exist, 447 * but not active. This initialization is necessary for some Clevo 448 * laptops that check this field before processing the brightness and 449 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if 450 * there are less than eight devices. */ 451 do { 452 disp_id = ioread32(&opregion->acpi->didl[i]); 453 iowrite32(disp_id, &opregion->acpi->cadl[i]); 454 } while (++i < 8 && disp_id != 0); 455 } 456 457 void intel_opregion_init(struct drm_device *dev) 458 { 459 struct drm_i915_private *dev_priv = dev->dev_private; 460 struct intel_opregion *opregion = &dev_priv->opregion; 461 462 if (!opregion->header) 463 return; 464 465 if (opregion->acpi) { 466 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 467 intel_didl_outputs(dev); 468 intel_setup_cadls(dev); 469 } 470 471 /* Notify BIOS we are ready to handle ACPI video ext notifs. 472 * Right now, all the events are handled by the ACPI video module. 473 * We don't actually need to do anything with them. */ 474 iowrite32(0, &opregion->acpi->csts); 475 iowrite32(1, &opregion->acpi->drdy); 476 477 system_opregion = opregion; 478 } 479 480 if (opregion->asle) 481 intel_opregion_enable_asle(dev); 482 } 483 484 void intel_opregion_fini(struct drm_device *dev) 485 { 486 struct drm_i915_private *dev_priv = dev->dev_private; 487 struct intel_opregion *opregion = &dev_priv->opregion; 488 489 if (!opregion->header) 490 return; 491 492 if (opregion->acpi) { 493 iowrite32(0, &opregion->acpi->drdy); 494 495 system_opregion = NULL; 496 } 497 498 /* just clear all opregion memory pointers now */ 499 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE); 500 opregion->header = NULL; 501 opregion->acpi = NULL; 502 opregion->swsci = NULL; 503 opregion->asle = NULL; 504 opregion->vbt = NULL; 505 } 506 507 int intel_opregion_setup(struct drm_device *dev) 508 { 509 struct drm_i915_private *dev_priv = dev->dev_private; 510 struct intel_opregion *opregion = &dev_priv->opregion; 511 char *base; 512 u32 asls, mboxes; 513 char buf[sizeof(OPREGION_SIGNATURE)]; 514 int err = 0; 515 516 asls = pci_read_config(dev->dev, PCI_ASLS, 4); 517 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls); 518 if (asls == 0) { 519 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n"); 520 return -ENOTSUP; 521 } 522 523 base = (void *)pmap_mapbios(asls, OPREGION_SIZE); 524 if (!base) 525 return -ENOMEM; 526 527 memcpy_fromio(buf, base, sizeof(buf)); 528 529 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 530 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 531 err = -EINVAL; 532 goto err_out; 533 } 534 opregion->header = (struct opregion_header *)base; 535 opregion->vbt = base + OPREGION_VBT_OFFSET; 536 537 opregion->lid_state = (u32 *)(base + ACPI_CLID); 538 539 mboxes = ioread32(&opregion->header->mboxes); 540 if (mboxes & MBOX_ACPI) { 541 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 542 opregion->acpi = (struct opregion_acpi *)(base + OPREGION_ACPI_OFFSET); 543 } 544 545 if (mboxes & MBOX_SWSCI) { 546 DRM_DEBUG_DRIVER("SWSCI supported\n"); 547 opregion->swsci = (struct opregion_swsci *)(base + OPREGION_SWSCI_OFFSET); 548 } 549 if (mboxes & MBOX_ASLE) { 550 DRM_DEBUG_DRIVER("ASLE supported\n"); 551 opregion->asle = (struct opregion_asle *)(base + OPREGION_ASLE_OFFSET); 552 } 553 554 return 0; 555 556 err_out: 557 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE); 558 return err; 559 } 560